{"pt::grammar::peg":{"rules":{"AddOp":{"is":"/ {t -} {t +}","mode":"value"},"Digit":{"is":"/ {t 0} {t 1} {t 2} {t 3} {t 4} {t 5} {t 6} {t 7} {t 8} {t 9}","mode":"value"},"Expression":{"is":"/ {x {t (} {n Expression} {t )}} {x {n Factor} {* {x {n MulOp} {n Factor}}}}","mode":"value"},"Factor":{"is":"x {n Term} {* {x {n AddOp} {n Term}}}","mode":"value"},"MulOp":{"is":"/ {t *} {t /}","mode":"value"},"Number":{"is":"x {? {n Sign}} {+ {n Digit}}","mode":"value"},"Sign":{"is":"/ {t -} {t +}","mode":"value"},"Term":{"is":"n Number","mode":"value"}},"start":"n Expression"}}